CN101688714B - Compressor motor control - Google Patents
Compressor motor control Download PDFInfo
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- CN101688714B CN101688714B CN2007800537433A CN200780053743A CN101688714B CN 101688714 B CN101688714 B CN 101688714B CN 2007800537433 A CN2007800537433 A CN 2007800537433A CN 200780053743 A CN200780053743 A CN 200780053743A CN 101688714 B CN101688714 B CN 101688714B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/005—Arrangement or mounting of control or safety devices of safety devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
- F25B41/22—Disposition of valves, e.g. of on-off valves or flow control valves between evaporator and compressor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
- F25B2400/13—Economisers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2500/00—Problems to be solved
- F25B2500/08—Exceeding a certain temperature value in a refrigeration component or cycle
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2600/00—Control issues
- F25B2600/02—Compressor control
- F25B2600/025—Compressor control by controlling speed
- F25B2600/0253—Compressor control by controlling speed with variable speed
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2600/00—Control issues
- F25B2600/02—Compressor control
- F25B2600/026—Compressor control by controlling unloaders
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2600/00—Control issues
- F25B2600/25—Control of valves
- F25B2600/2509—Economiser valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2600/00—Control issues
- F25B2600/25—Control of valves
- F25B2600/2515—Flow valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/15—Power, e.g. by voltage or current
- F25B2700/151—Power, e.g. by voltage or current of the compressor motor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/21—Temperatures
- F25B2700/2115—Temperatures of a compressor or the drive means therefor
- F25B2700/21156—Temperatures of a compressor or the drive means therefor of the motor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
- F25B49/022—Compressor control arrangements
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Air Conditioning Control Device (AREA)
- Devices That Are Associated With Refrigeration Equipment (AREA)
- Control Of Positive-Displacement Pumps (AREA)
Abstract
A compressor, which is susceptible to protective shutdowns when certain operating conditions are sensed, includes a control feature wherein, when the compressor is restarted after a period of time, it may be caused to operate in an unloaded mode such that a reoccurrence of the shutdowns is less likely.
Description
[technical field]
The present invention relates generally to refrigeration system, relate in particular to the compressor that optionally unloads refrigeration system.
[background technology]
Air-conditioning and refrigeration system generally include and detect the protection mechanism when compressor transships.When this condition was detected, compressor will be shut down a period of time usually, restarted usually after shutting down then again.In some cases, when compressor detected bust, when operator, technician or maintenance personal recognized the root of this fault, compressor just can restart.Normally, the electric current in protection mechanism and the motor and/or the measurement of motor temperature are relevant, perhaps relevant with the direct effect of these parameters on protective device, the electro-motor line interruption that for example takes place in response to this.
This condition can occur in the high temperature surrounding environment that needs most cooling usually, and refrigeration system moves to satisfy these cooling requirements under extremely high load.That is to say, in the meantime, if cause compressor motor to be shut down owing to protective device engages, then will can not give the occupant of conditioned space or the food refrigerated refrigeration that provides in the refrigerating chamber.When motor restarted, it will suffer high-load condition, and might shut down again in the short relatively time period.Therefore, when refrigeration being provided seldom or refrigeration not being provided, then can prolong the temperature conditions that is higher than expection during, and cause the food in occupant's the uncomfortable or cold storage container of environment of weather control to damage.In extreme environmental conditions is applied to these time periods on the refrigeration system, also expect even obtain some refrigeration with the speed that reduces.
[summary of the invention]
Simply, according to an aspect of the present invention, be in or approach take place line interruption shut down after compressor motor time of restarting, make compressor operating reduce load pattern, thus the generation that unlikely causes another line interruption to be shut down.
According to another aspect of the present invention, when reckoning with and may compressor shutdown take place, compressor switches to next less load operating pattern, to avoid or to prevent halt condition.
According to a further aspect of the invention, by refrigeration system is switched to not save mode from save mode, never save mode switches to bypass mode, suppresses stream by sucking control valve, perhaps operate the suction control valve in the pulse-width regulated mode, can realize the unloading of compressor.
According to another aspect of the present invention, at least a in the following manner: be used for that the variable speed drives of compressor motor, many speed of being used for compressor motor drive, compressing member at least some permanent disengaging, with the active heat transfer device of the variable number of joint-disengaging, variable air manager system and the refrigeration system of the compressing member of pulse-width regulated mode, can realize the unloading of compressor.
By another aspect of the present invention, the number of times that interrupt to shut down takes place with computational scheme of can taking measures, and after the line interruption that predetermined quantity only takes place in the section at the fixed time shuts down just makes compressor unloading.
By another aspect of the present invention, can take measures more to add the carrying row mode after running into some predetermined condition, to turn back to.
The invention provides a kind of controller, it is used for operation and has the refrigeration system of the motor-driven compressor that suffers the variable load condition, this control comprises: identification mechanism, and it is when compressor operating during at first loading mode, the condition of identification indication excess compression machine load; And feel trim actuator, be used for responsively reducing compressor load, to prevent compressor shutdown; Counter, this counter are used for calculating the continuous shutdown number of times that is caused by the drive motor of compressor overload protection; Timer; this timer is used for the time of record from the initial shutdown of compressor to the moment of shutting down of compressor next time; only when counter in the predetermined time section during recording scheduled shutdown number of times, described feel trim actuator moves drive motor of compressor under unloading mode.
Described identification mechanism comprises at least one sensor.Described compressor load is relevant with the compressor motor load.Described at least one sensor comprises the compressor motor current sensor.Described at least one sensor comprises the sensor for detection of the temperature of drive motor of compressor.Described at least one sensor comprises compressor motor current sensor and compressor motor temperature sensor.Described at least one sensor comprises the temperature sensor of the service condition in the detection refrigeration system and at least one in the pressure sensor.By one of switching in the following operational mode: do not save and be bypassed to suction, described feel trim actuator reduces the load on the compressor motor automatically.At least a in the following manner: suck control valve, be used for the variable speed drives of compressor motor, many speed of being used for compressor motor drive, compressing member at least some permanent disengaging, with the joint-disengaging of the compressing member of pulse-width regulated mode, described feel trim actuator reduces the load on the compressor motor automatically.Also comprise be used to the drive motor of compressor overload protection that stops compressor operating.Described motor overload protection comprises the line interruption stop device.Described motor overload protection comprises g sensor.Described suction control valve comprises suction pulse-width regulated valve.Comprise timer, timer is used for the time of record from the initial shutdown of the compressor that causes by line interruption equipment to the moment of shutting down of the compressor that causes by line interruption equipment next time.Also comprise load maintainer, this load maintainer is used for optionally and automatically increasing the load on the compressor when satisfying predetermined condition.Also comprise timer, timer is used for record and shuts down the time of starting at from the last time of the compressor that caused by line interruption equipment.When the predetermined time period of starting at from the last time shutdown had expired, load maintainer increased the load on the drive motor of compressor.
The present invention also provides a kind of method for the control refrigeration system, and refrigeration system has the motor-driven compressor that suffers the variable load condition, and it comprises step: when compressor operating during at first loading mode, detect the condition of indication excess compression machine load; And responsively reduce compressor load, to prevent compressor shutdown; Calculate the continuous shutdown number of times of compressor and the record time from the initial shutdown of compressor to the moment of shutting down of compressor next time; described load reduces step and only comprises when counter during recording scheduled shutdown number of times, move compressor under minimizing load capacity pattern in the predetermined time section.
The described detected condition of indication excess compression machine load is a kind of condition of indicating excess compression machine motor load.Before shutting down, the overload of expection starts described minimizing step.Take place overload shut down after and restart drive motor of compressor after after a while before, start described minimizing step.Described detection step comprises the step that detects the compressor motor electric current.Described detection step is to detect the step of the temperature of drive motor of compressor.Described detection step comprises the detection of compressor motor electric current and compressor motor temperature.By one of switching in the following operational mode: do not save and be bypassed to suction, described compressor load reduces step and reduces load on the compressor motor automatically.At least a in the following manner: suck control valve, be used for the variable speed drives of compressor motor, many speed of being used for compressor motor drive, compressing member at least some permanent disengaging, with joint-disengagings of the compressing member of pulse-width regulated mode, described load minimizing step reduces the load on the compressor motor automatically.Described suction control valve comprises suction pulse-width regulated valve.Be included in the step that optionally increases the load capacity operational mode under the predetermined condition.In the accompanying drawing of the following stated, describe a preferred embodiment, still, can make other various modifications and alternate configuration to this preferred embodiment, and not break away from the spirit and scope of the present invention.
[description of drawings]
Fig. 1 is the schematic diagram of the present invention when including refrigeration system in.
Fig. 2 is the flow chart of describing according to typical control method of the present invention.
Fig. 3 is the diagram of execution result of the present invention.
[specific embodiment]
Fig. 1 has schematically disclosed a kind of refrigerating circuit, in this refrigerating circuit, connects compressor 11, condenser 12, expansion gear 13 and evaporimeter 14 with typical serial cold-producing medium flow relation.Location condenser 12 makes condenser fan 16 that surrounding air is crossed the there and sends away, in order that make superheated steam desuperheating, condensation, and makes from the refrigerant vapour of compressor 11 receptions cold excessively then.The condenser 12 that is known that subcritical (subcritical) circulation becomes the gas cooler that critical be used to striding (trans-critical) uses, and it operates in the cold-producing medium critical point in this application.Location evaporimeter 14 to be receiving from regulating may being cooled again with the air that the part of fresh air is mixed mutually that the space returns, and by evaporator fan 17 be used for will cooling air be transported to the environment of weather control.Cold-producing medium is evaporated in evaporimeter 14 and is normally overheated.Although Fig. 1 has described basic refrigeration system device, in various in the art selections with to strengthen feature be feasible with known.All these system configuration and can be comparably be benefited from the present invention all within the scope of the invention.
To understand, refrigeration system compressor 11 suffers variable load, and this variable load depends on various factors, as ambient temperature, regulate the space heat (responsive with potential) workload demand, be fed to power of compressor etc.Therefore, provide various patterns to be used for operation compressor 11 with refrigeration or the heating demand of coupling in the space of weather control.
In the typical refrigerant system that Fig. 1 is schematically shown, in order to change the load or unload degree of compressor 11, provide several unloading features, for example saver 18, by-passing valve 19 and suction control valve 21.Though following argumentation only limits to these three kinds unloading features, but can provide other selections, this can include but not limited to the element (as heat exchanger) etc. of the variable number of variable or many ram compressions compressor motor, variable air manager system, parallel running, and all these unloading steps also within the scope of the invention.
For saving operation, just as, for example, as during drop-down (pulldown) or steady-state operation under high temperature surrounding environment or deep refrigerating condition, when the needs additional capacity, enter the liquid refrigerant further cooling by the operation of economizer heat exchanger 18 in the major loop of evaporator expansion device 13.In order to activate economizer heat exchanger 18, open economizer expansion device 22, in order to make the part cold-producing medium flow through economizer expansion device 18, flow to the heat of the liquid refrigerant of evaporator expansion device 13 with absorption.Therefore, increase the heat cooling potentiality of the cold-producing medium of inflow evaporator 14, improved the performance (capacity and efficient) of refrigeration system." medium " temperature/pressure saver refrigerant vapour that synthesizes injects compressor 11 from the mid point of compressor 11.This economizer flow is mixed with the suction refrigerant vapour of part compression, and will suck steam usually and be cooled to lower temperature.Because the saver cold-producing medium enters compressor 11 under than the higher pressure of the cold-producing medium of the inhalation port that flows through compressor 11, be compressed to release pressure with respect to sucking steam from suction pressure, need the energy (per unit mass) still less to go refrigerant vapour is compressed to release pressure from economizer pressure.In any case owing to inject and need be compressed by economizer port (or some ports), the cold-producing medium of the additional amount that circulates in whole system has increased the overall compression acc power then.Therefore, with respect to traditional (not saving) operational mode, save operational mode higher load is applied on the compressor 11.Should be pointed out that and then other flow control device should be integrated in the economizer if economizer expansion device 22 does not have the shutdown ability.In addition, as known in the art, the economizer cycle that Fig. 1 is schematically shown has many variations, and all these within the scope of the invention.
Activate the by-pass operation pattern by opening by-passing valve 19, make the part transmission of part refrigerant compressed steam return the inhalation port of compressor 11, thereby reduce compressor horsepower (because the cold-producing medium of reduction is compressed to release pressure from scala media pressure) and refrigerant system capacity (because the cold-producing medium of low amount flows through evaporimeter 14).
Suck the adjusting pattern for refrigeration system is operated in, will suck control valve 21 and optionally move to partially enclosed position, flow to the cold-producing medium of compressor 11 with minimizing.This is the thermic load for the space of further balance compressor capacity and weather control.In this operational mode, can optionally open liquid injection electromagnetic valve (not shown) as required and flow to the inhalation port of compressor 11 with the expansion liquid state cold-producing medium that q.s is provided, be used for the cooling of compressor motor.Should be noted that sucking control valve 21 can be substituted by the analog of cold-producing medium stream that pulse-width regulated valve or control flow into the inhalation port of compressor 11.
As above-mentioned, any other Unloading Technology, for example, except above disclosed example, the disengaging of some pistons of many piston reciprocating compressors or control in the pulse-width regulated mode scroll compressor scroll member joint all within the scope of the invention.
The above is used for the execution of the various devices of load/unload compressor 11 and finishes by a controller 23.More particularly, controller 23 is connected to economizer expansion device 22 by power pipe 24, is connected to compressor 11 by power pipe 26, is connected to by-passing valve 19 and is connected to suction control valve 21 by power pipe 28 by power pipe 27.
The sensor 29 and 31 that is connected respectively to controller 23 by power pipe 32 and 33 also can be set.Sensor 29 is set with the electric current of the motor of detection drive compression machine 11, sensor 31 is set to detect the temperature of the CD-ROM drive motor that is used for compressor 11.In these detected conditions one or both can be used for determining that compressor 11 is in overload condition (or just near overload condition) and the temporary transient shutdown of needs.On the other hand, this temporary transient shutdown can be finished by line interruption, and this can be, bimetallic plates contactor for example, and the bimetallic plates contactor is installed on the compressor motor, and excessive electric current and/or temperature are automatically reacted.Also other sensors can be installed, to determine that whether compressor operating is just near overload condition.This sensor is passable, for example, comprises the pressure sensor of the high or low pressure side that is installed in refrigeration system, and the temperature sensor relevant with refrigeration system condenser and/or evaporator heat exchanger.In addition, electric current or power sensor can directly detect the overload of compressor condition.
Referring now to Fig. 2; the mode of a kind of typical stream control chart to show that controller 23 may move after the line interruption shutdown takes place is shown; operate in unloaded state so that allow compressor 11 to return; thereby; though refrigeration system is moved with the minimizing capacity,, although can realize the cooling that at least some are reduced; otherwise will force this moment compressor 11 to another line interruption, cause between another extended period of not moving.
At frame piece 34, calculate the counter of shutting down number of times successively and be set to C=0.Periodically, sometime at interval at the expiration after, as shown in the frame piece 36, compressor 11 operates in loading mode, as shown in the frame piece 37, inquires whether this system line interruption takes place shut down.If no, this system continues operation, and until shutting down, in this case, controller enters frame piece 38.Counter reset is C=C+1 then, whether then inquires C=2 (whether line interruption has namely been arranged twice successively) in frame piece 39.In this respect, should be appreciated that in this specific embodiment, the threshold value that is used for execution control method of the present invention is set to take place line interruption twice.Certainly, this can be according to required change of any specific application.
At frame piece 39, if C is not equal to 2 (being that this is not the continuous line interruption second time), or less than 2 and equal at 1 o'clock, in this specific embodiment, so in frame piece 41, it is 0 that timer is set, and the disconnected running status that turns back to it starts the refrigeration system operation afterwards under same loading mode in the line.Equal 2 if find C, double shutdown has so taken place, controller 23 enters frame piece 40, wherein inquiry system from time that last line interruption is shut down whether greater than t
1, this t
1Be the time cycle, this time cycle has been pre the permission time interval between shutting down continuously, and therefore provides the reason of not carrying out unloaded mode of operation, because under the sort of situation, twice continuous shutdown unlikely caused by same factor.Therefore, if determined that t is greater than t
1, controller 23 enters frame piece 42 with counter reset C=1 so.In addition, as preceding, timer t=0 is set in frame piece 41, makes refrigeration system operate under the same loading mode, shown in frame piece 36.
If t is no more than t
1, being likely that so identical factor causes shutting down continuously for twice, controller 23 enters frame piece 43, with replacement timer t=0, arrives frame piece 44 then, then restarts compressor motor here under next unloaded mode of operation.In this, the special operational mode that is used for compressor 11 changes, and more manys the state of unloading thereby make it operate in than the state that causes last secondary line to interrupt shutting down.For example, for typical refrigerant system as shown in Figure 1, the order from maximum loading modes to minimum loading mode operational mode is with as follows: the fully loaded pattern of saving, the fully loaded pattern of not saving, the bypass mode of not saving and have the bypass mode of not saving that sucks control valve.
Therefore, suppose that when line interruption shutdown for the second time took place, this system was just operating in the fully loaded pattern of saving, so, at frame piece 44, may restart compressor is to operate under the fully loaded pattern of not saving.As in frame piece 46, if taking place at that time, another line interruption shut down, refrigeration system will proceed to frame piece 47 so, thereby, now loading mode is reset to the full-load run of not saving.
Shown in frame piece 46, shut down if line interruption takes place, refrigerant system controller 23 proceeds to frame piece 48 so, inquire under the unloaded mode of operation whether interval greater than t
2, this is the time interval of the safe enough be scheduled to, after this time interval, refrigeration system may attempt to restart under the load operating pattern.If t is greater than t
2, controller 23 is reset to frame piece 34, repetitive cycling so.If the time, t was less than t
2, system is reset to frame piece 44 so, and continues the operation under the unloading mode.
Should be appreciated that above-mentioned flow chart only is an example of this method particular value of using some parameter.Therefore, the number of times that the line interruption that took place before unloading step is shut down can be selected as required, value t
1And t
2Too can.In addition, except calculating predetermined time interval t
1And t
2, by according to from the feedback that is positioned at the sensor in refrigeration system and the relevant environment, can more add " test " refrigeration system under the operational mode of carrying.These sensors, as an example, for example, temperature and/or pressure sensor and their optimum position are well known in the art.
With reference now to Fig. 3,, is illustrated in the exemplary of contingent all temps trend during more and the mode operation that still less loads.As common, ambient temperature T
AmbTend to increased from early morning to the dusk always.Therefore, when moving under the situation that is not having control feature as previously discussed, the line interruption temperature T under the load operating pattern
LoadMay reach and turn-off temperature extremes T
Citoff, as shown.But, if system moves having under the situation of controlling feature as discussed above, the line interruption temperature T under the unloaded mode of operation so
UnloadKeep below the shutoff temperature extremes T that compressor will be shut down
CutoffTherefore, refrigeration system continues operation, and the air of adjusting is provided to the space of weather control.
Should be noted in the discussion above that refrigerant system controller 23 by compressor operation parameters being remained in the predetermined allowed band, can move on one's own initiative to prevent potentially that by unloading compressor 11 successively any line interruption from shutting down.In this case, controller 23 will rely on the feedback from sensor, and sensor is positioned in the refrigeration system and the information relevant with the crucial operational factor that is used for compressor 11 is provided.These sensors, as an example, for example, temperature sensor, pressure sensor, current sensor and power sensor, and their optimum position is known in this area.These sensors can directly be measured the crucial operational factor for compressor 11, or the enough data that can translate into the key parameter value are provided for controller 23.
Be also to be understood that in the context of above embodiment, can be reciprocating type from comprising, spiral, select compressor the various type of compressor of vortex type, centrifugal or axial compressor.Each compressor can be presented by a plurality of compressors.For example, compressor can be made up of some continuous centrifugal formula compressor stages.In addition, a plurality of compressors can walk abreast or the serial arrangement operation.In addition, this invention can be applied to comprise the different refrigeration system types of dwelling house and commercial refrigeration and heat supply application.It also can be used to provide cooling and refrigeration in supermarket, truck-trailer and container application.
Though some preferred embodiment of the present invention has been carried out detailed disclosure, be understandable that, can be to carrying out various modifications on its structure, and do not break away from the spirit and scope of the present invention.
Claims (28)
1. controller, it is used for operation and has the refrigeration system of the motor-driven compressor that suffers the variable load condition, and this controller comprises:
Identification mechanism, it is when compressor operating during at first loading mode, the condition of identification indication excess compression machine load; And
Feel trim actuator is used for responsively reducing compressor load, to prevent compressor shutdown;
Counter, this counter are used for calculating the continuous shutdown number of times that is caused by the drive motor of compressor overload protection;
Timer, this timer are used for the time of record from the initial shutdown of compressor to the moment of shutting down of compressor next time,
Only when counter in the predetermined time section during recording scheduled shutdown number of times, described feel trim actuator moves drive motor of compressor under unloading mode.
2. controller according to claim 1, wherein said identification mechanism comprises at least one sensor.
3. controller according to claim 1, wherein said compressor load is relevant with the compressor motor load.
4. controller according to claim 2, wherein said at least one sensor comprises the compressor motor current sensor.
5. controller according to claim 2, wherein said at least one sensor comprises the sensor for detection of the temperature of drive motor of compressor.
6. controller according to claim 2, wherein said at least one sensor comprises compressor motor current sensor and compressor motor temperature sensor.
7. controller according to claim 2, wherein said at least one sensor comprise the temperature sensor that detects the service condition in the refrigeration system and at least one in the pressure sensor.
8. controller according to claim 1, wherein by one of switching in the following operational mode: save mode and be bypassed to the pattern of suction not, described feel trim actuator reduces the load on the compressor motor automatically.
9. controller according to claim 1, at least a in the following manner wherein: suck control valve, be used for the variable speed drives of compressor motor, many speed of being used for compressor motor drive, compressing member at least some permanent disengaging, with the joint-disengaging of the compressing member of pulse-width regulated mode, described feel trim actuator reduces the load on the compressor motor automatically.
10. controller according to claim 1, it also comprises be used to the drive motor of compressor overload protection that stops compressor operating.
11. controller according to claim 10, wherein said motor overload protection comprises the line interruption stop device.
12. controller according to claim 7, wherein said motor overload protection comprises g sensor.
13. comprising, controller according to claim 9, described suction control valve suck the pulse-width regulated valve.
14. controller according to claim 10, it comprises timer, and timer is used for the time of record from the initial shutdown of the compressor that causes by line interruption equipment to the moment of shutting down of the compressor that causes by line interruption equipment next time.
15. controller according to claim 1, it also comprises load maintainer, and this load maintainer is used for optionally and automatically increasing the load on the compressor when satisfying predetermined condition.
16. controller according to claim 15, it also comprises timer, and timer is used for record and shuts down the time of starting at from the last time of the compressor that caused by line interruption equipment.
17. controller according to claim 16, wherein when the predetermined time period of starting at from the last time shutdown had expired, load maintainer increased the load on the drive motor of compressor.
18. a method that is used for the control refrigeration system, refrigeration system has the motor-driven compressor that suffers the variable load condition, and it comprises step:
When compressor operating during at first loading mode, detect the condition of indication excess compression machine load; And
Responsively reduce compressor load, to prevent compressor shutdown;
Calculate the continuous shutdown number of times of compressor and the record time from the initial shutdown of compressor to the moment of shutting down of compressor next time,
Described load reduces step and only comprises when counter during recording scheduled shutdown number of times, move compressor under minimizing load capacity pattern in the predetermined time section.
19. method according to claim 18, wherein indicating the described detected condition of excess compression machine load is a kind of condition of indicating excess compression machine motor load.
20. method according to claim 18 wherein started described minimizing step before the overload of expection is shut down.
21. method according to claim 18, wherein take place overload shut down after and restart drive motor of compressor after after a while before, start described minimizing step.
22. method according to claim 18, wherein said detection step comprise the step that detects the compressor motor electric current.
23. method according to claim 18, wherein said detection step are to detect the step of the temperature of drive motor of compressor.
24. method according to claim 18, wherein said detection step comprises the detection of compressor motor electric current and compressor motor temperature.
25. method according to claim 18, wherein by one of switching in the following operational mode: save mode and be bypassed to the pattern of suction not, described compressor load reduce step and reduce load on the compressor motor automatically.
26. method according to claim 18, at least a in the following manner wherein: suck control valve, be used for the variable speed drives of compressor motor, many speed of being used for compressor motor drive, compressing member at least some permanent disengaging, with joint-disengagings of the compressing member of pulse-width regulated mode, described load minimizing step reduces the load on the compressor motor automatically.
27. comprising, method according to claim 26, described suction control valve suck the pulse-width regulated valve.
28. method according to claim 18, it is included in the step that optionally increases the load capacity operational mode under the predetermined condition.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/US2007/011627 WO2008143608A1 (en) | 2007-05-15 | 2007-05-15 | Compressor motor control |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101688714A CN101688714A (en) | 2010-03-31 |
| CN101688714B true CN101688714B (en) | 2013-09-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007800537433A Expired - Fee Related CN101688714B (en) | 2007-05-15 | 2007-05-15 | Compressor motor control |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US20100236264A1 (en) |
| CN (1) | CN101688714B (en) |
| WO (1) | WO2008143608A1 (en) |
Families Citing this family (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SG183387A1 (en) | 2010-03-08 | 2012-09-27 | Carrier Corp | Refrigerant distribution apparatus and methods for transport refrigeration system |
| WO2011117765A2 (en) * | 2010-03-25 | 2011-09-29 | Koninklijke Philips Electronics N.V. | Controlling a oxygen liquefaction system responsive to a disturbance in supplied power |
| RU2591105C2 (en) | 2010-09-28 | 2016-07-10 | Кэрие Корпорейшн | Method for operation of vehicle cooling systems to avoid engine stoppage and overload |
| WO2013016505A2 (en) | 2011-07-27 | 2013-01-31 | Carrier Corporation | Method for smooth motor startup |
| JP5802530B2 (en) * | 2011-12-02 | 2015-10-28 | 株式会社日立産機システム | air compressor |
| ES2806299T3 (en) * | 2012-03-09 | 2021-02-17 | Carrier Corp | Closed-loop power management and capacity plan for multi-stage transport refrigeration system |
| EP2904336A2 (en) * | 2012-08-06 | 2015-08-12 | Kriwan Industrie-Elektronik GmbH | Method for controlling a compressor of a refrigeration system, and refrigeration system |
| CN104755861B (en) * | 2012-08-24 | 2016-11-16 | 开利公司 | Level in transcritical refrigerant vapor compression system changes |
| FR3005804B1 (en) * | 2013-05-16 | 2015-06-12 | Continental Automotive France | METHOD FOR MANAGING AN ELECTRONIC CIRCUIT COMPRISING A THERMAL PROTECTION DEVICE AND CORRESPONDING ELECTRONIC CIRCUIT |
| SG11201600715UA (en) | 2013-08-01 | 2016-02-26 | Carrier Corp | Refrigerant level monitor for refrigeration system |
| US10371426B2 (en) | 2014-04-01 | 2019-08-06 | Emerson Climate Technologies, Inc. | System and method of controlling a variable-capacity compressor |
| CN106461302B (en) * | 2014-06-09 | 2019-04-02 | 艾默生环境优化技术有限公司 | System and method for controlling variable displacement compressor |
| DE102016101969A1 (en) * | 2016-02-04 | 2017-08-10 | Kriwan Industrie-Elektronik Gmbh | Three-phase AC motor with protection device and method for monitoring a three-phase AC motor |
| DK3635304T3 (en) | 2017-06-08 | 2022-04-11 | Carrier Corp | METHOD FOR MANAGING ECONOMISES FOR TRANSPORT COOLING UNITS |
| CN107606836B (en) * | 2017-10-13 | 2020-02-21 | 苏州利森空调制冷有限公司 | Starting control method of single-screw refrigeration compressor |
| CN109899278B (en) * | 2017-12-08 | 2021-09-03 | 丹佛斯（天津）有限公司 | Controller and control method for compressor, compressor assembly and refrigeration system |
| US11073319B2 (en) | 2017-12-29 | 2021-07-27 | Johnson Controls Technology Company | Capacity control technique with motor temperature override |
| WO2021030169A1 (en) | 2019-08-09 | 2021-02-18 | Carrier Corporation | Cooling system and method of operating a cooling system |
| CN111238071B (en) * | 2020-01-07 | 2021-11-05 | 浙江中广电器股份有限公司 | Air conditioner and low-temperature heating method thereof |
| US11131491B1 (en) | 2020-08-07 | 2021-09-28 | Emerson Climate Technologies, Inc. | Systems and methods for multi-stage operation of a compressor |
| US11549717B2 (en) * | 2021-03-31 | 2023-01-10 | Trane International Inc. | Online optimization of variable frequency drive compression efficiency |
| CN115046338B (en) * | 2022-05-12 | 2023-11-07 | 冰山松洋生物科技(大连)有限公司 | Control method and device for refrigeration equipment, medium and program product |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1191960A (en) * | 1997-01-08 | 1998-09-02 | 三星电子株式会社 | Device and method for controlling a compressor in a refrigerator |
| US6925823B2 (en) * | 2003-10-28 | 2005-08-09 | Carrier Corporation | Refrigerant cycle with operating range extension |
| US7032397B1 (en) * | 2003-09-09 | 2006-04-25 | Emerson Electric Co. | Thermostat for use with compressor health indicator |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5454229A (en) * | 1994-05-18 | 1995-10-03 | Thermo King Corporation | Refrigeration unit control with shutdown evaluation and automatic restart |
| US6210119B1 (en) * | 1998-06-05 | 2001-04-03 | Carrier Corporation | Reverse rotation detection compressors with a preferential direction of rotation |
-
2007
- 2007-05-15 US US12/599,579 patent/US20100236264A1/en not_active Abandoned
- 2007-05-15 CN CN2007800537433A patent/CN101688714B/en not_active Expired - Fee Related
- 2007-05-15 WO PCT/US2007/011627 patent/WO2008143608A1/en active Application Filing
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1191960A (en) * | 1997-01-08 | 1998-09-02 | 三星电子株式会社 | Device and method for controlling a compressor in a refrigerator |
| US7032397B1 (en) * | 2003-09-09 | 2006-04-25 | Emerson Electric Co. | Thermostat for use with compressor health indicator |
| US6925823B2 (en) * | 2003-10-28 | 2005-08-09 | Carrier Corporation | Refrigerant cycle with operating range extension |
Also Published As
| Publication number | Publication date |
|---|---|
| US20100236264A1 (en) | 2010-09-23 |
| WO2008143608A1 (en) | 2008-11-27 |
| CN101688714A (en) | 2010-03-31 |
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